Flash memory shows promise for use in storage devices for mobile computers. However, flash memory cannot be overwritten unless erased in advance. Erase operations are slow that usually decrease system performance, and consume power. For power conservation, better system performance, and longer flash memory lifetime, system support for erasure management is necessary. In this report, a non-updat...

In flash storage, an FTL is a complex piece of code that resides completely inside the storage device and is provided by the manufacturer. Its principal virtue is providing interoperability with conventional HDDs. However, this virtue is also its biggest impediment in reaching the full performance of the underlying flash storage. We propose to refactor the flash storage architecture so that it ...

Flash memory is gaining great popularity in both embedded and enterprise systems. Compared to legacy hard drives, flash devices get rid of mechanical components and significantly improve performance. However, flash memory is not merely a faster storage media, and its characteristics provide opportunities of new storage system designs. In this paper, we summarize disruptive techniques on flash s...

In embedded systems, NAND flash memory is typically used as a storage medium because of its non-volatility, fast access time and solid-state shock resistance. However, it suffers from out-place-update, limited erase cycles and page based read/write operations. Flash file systems such as JFFS2 and YAFFS, allocate memory spaces using LFS (Log-structured File System) to solve these problems. Becau...

Background: Aberrant Wnt/b-catenin signaling is associated with breast cancer even though genetic mutations in Wnt signaling components are rare. We have previously demonstrated that Rad6B, an ubiquitin conjugating enzyme, stabilizes b-catenin via polyubiqutin modifications that render b-catenin insensitive to proteasomal degradation. Rad6B is a transcriptional target of b-catenin, creating a p...

Until recently, the common approach to using Flash memory technology in embedded devices has been to use a pseudo-filesystem on the flash chips to emulate a standard block device and provide wear levelling, and to use a normal file system on top of that emulated block device. JFFS is a log-structured file system designed by Axis Communications AB in Sweden specifically for use on flash devices ...

The need for low power, small form-factor, secondary storage devices in embedded systems has led to the widespread use of flash memory. Energy consumption due to processor and flash for such devices is critical to embedded system design. In this paper, we have proposed a quantitative account of energy consumption in both processor and flash due to overhead of filesystem related system calls. A ...